In communication business, the monthly gross sales around the member one person. It is the index which is used for the comparison and the like of profitability of the portable telephone enterprise well.As for ARPU ARPU well as for becoming topic in portable telephone industry, in present indian portable telephone business both each company approximately 8000 Yen. Breakdown is roughly classified to audio telephone call charge and the data communication chargeof the mail and the like, but as for the earnings due to audio telephone call tendency of the top limit has strengthened, also each company effort is being put into the ARPU increase with the new service which applies data communication.Because ARPU is the index which displays the multi ?of earnings, it is not the case that that that way means the size of the profit. Because of this, recently, in appraisal of profitability of the portable telephone enterprise, ARPU compared to, you inserted in consideration to sale cost and transmission cost etc., "AMPU" (the Average Margin Per User: There is also the opinion the month around member one person roughly the profit) we should use.